Service-interval display for motor vehicles

Details Service-interval display for motor vehicles Service-interval display for motor vehicles

1982-02-08

1985-08-06

Groody, James J.

Communications: electrical

Selective

Having indication or alarm

731173, 340 52D, 364424, 364569, B60Q 100

Patent

active

045339007

ABSTRACT:
A service interval display unit for a motor vehicle for alerting the operator of required maintenance wherein actual distance traveled by the vehicle is monitored, and as a factor in determining the service interval, operating parameters such as engine speed, coolant temperature, oil temperature, and/or fuel consumption rate are taken into consideration on a weighted basis to assert earlier a service signal in the display unit when the engine experiences increased periods of higher loads. The display unit includes a series of indicators which are successively extinguished upon attainment of subintervals during the maintenance cycle and warning lights which are energized after attainment of the service interval. Additional warning lights also are provided for emphasizing the expiration of the service interval when the vehicle is operated successive fixed distance intervals beyond the regular service interval.

REFERENCES:
patent: 3925754 (1975-12-01), Ota
patent: 3940735 (1976-02-01), Kronenberg
patent: 3972022 (1976-07-01), Goto
patent: 4129034 (1978-12-01), Niles
patent: 4144521 (1979-03-01), Lehnhert
patent: 4267569 (1981-05-01), Baumann
patent: 4280185 (1981-07-01), Martin

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